20853380

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{103}}^1\times {\mathrm{191}}^1$

素因数の和:356

約数の個数: 48

約数和(自身を含む): 45287424

約数和(自身を除く): 24434044

約数列:

[1, 2, 4, 5, 10, 20, 53, 103, 106, 191, 206, 212, 265, 382, 412, 515, 530, 764, 955, 1030, 1060, 1910, 2060, 3820, 5459, 10123, 10918, 19673, 20246, 21836, 27295, 39346, 40492, 50615, 54590, 78692, 98365, 101230, 109180, 196730, 202460, 393460, 1042669, 2085338, 4170676, 5213345, 10426690, 20853380]

約数ペア:

[(1, 20853380), (2, 10426690), (4, 5213345), (5, 4170676), (10, 2085338), (20, 1042669), (53, 393460), (103, 202460), (106, 196730), (191, 109180), (206, 101230), (212, 98365), (265, 78692), (382, 54590), (412, 50615), (515, 40492), (530, 39346), (764, 27295), (955, 21836), (1030, 20246), (1060, 19673), (1910, 10918), (2060, 10123), (3820, 5459)]